Monthly Belfast water temperature chart
The bar chart below shows the average monthly sea temperatures at Belfast over the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 9.1 | 8.3 | 8.2 | 8.9 | 10.2 | 11.9 | 13.7 | 14.3 | 14.2 | 13.4 | 12.3 | 10.6 |
| °F | 48.4 | 46.9 | 46.8 | 48 | 50.4 | 53.4 | 56.7 | 57.7 | 57.6 | 56.1 | 54.1 | 51.1 |
Monthly average max / min water temperatures
The graph below shows the range of monthly water temperatures over several years.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min °C | 8 | 7.4 | 7.2 | 7.8 | 9.4 | 9.8 | 12 | 13.5 | 13.6 | 12.6 | 11.3 | 9.4 |
| Max °C | 10.3 | 9.3 | 9.2 | 10 | 11.1 | 14 | 15.4 | 15.2 | 14.9 | 14.3 | 13.3 | 11.8 |
| Min °F | 47.3 | 46 | 45.8 | 46.9 | 49.6 | 51.3 | 55 | 56.9 | 57 | 55.3 | 53.1 | 49.9 |
| Max °F | 49.6 | 47.9 | 47.8 | 49.1 | 51.3 | 55.5 | 58.4 | 58.6 | 58.3 | 57 | 55.1 | 52.3 |